Missouri Land Surveying Law: A Property Owner's Overview
Missouri land surveying is governed by a combination of state statutes, licensing requirements, and recording rules that affect every property owner in the state. Whether you are resolving a boundary dispute, planning a fence, or buying land, understanding the legal framework that surrounds land surveys in Missouri helps you protect your investment and avoid costly mistakes.
Chapter 327 RSMo: Who Can Survey in Missouri
Missouri Revised Statutes Chapter 327 governs the licensing of professional land surveyors in Missouri. Under Chapter 327, only a licensed Professional Land Surveyor (PLS) may establish or re-establish property boundaries, prepare boundary survey plats, and certify survey documents for legal use in Missouri.
The licensing authority is the Missouri Board for Architects, Professional Engineers, Professional Land Surveyors and Landscape Architects, commonly known as APELSLA. APELSLA is a state agency that issues PLS licenses, sets standards of practice, investigates complaints against licensees, and maintains the public license registry at pr.mo.gov/apelsla.asp.
A PLS candidate in Missouri must pass both NCEES examinations, complete four years of supervised experience under a licensed surveyor, and receive APELSLA's approval before practicing independently. The license must be renewed periodically, and Missouri PLSs are required to complete continuing education to maintain their credentials.
Hiring an unlicensed individual to perform what amounts to a boundary survey is a violation of Missouri law. Any survey document prepared by an unlicensed person lacks legal standing in Missouri courts, cannot be recorded, and cannot be used to resolve a boundary dispute.
Chapter 60 RSMo: County Surveyors and Corner Restoration
Missouri law under RSMo Chapter 60 establishes the role of the county surveyor. Every Missouri county has an elected county surveyor whose duties include restoring lost or obliterated section corners and quarter-section corners in the Public Land Survey System (PLSS).
The specific provisions at RSMo 60.550 through 60.590 govern corner restoration procedures. When a county surveyor re-establishes a lost corner, they are required to file a Corner Record documenting the monument's location, the methods used to establish it, and all evidence considered. These Corner Records become part of the county's permanent land records and serve as reference points for future surveys in the area.
County surveyors are elected officials, not necessarily licensed PLSs in every Missouri county, though many hold both titles. Their corner restoration role is distinct from private surveying practice: county surveyors restore PLSS monuments as a public function, while private PLSs perform boundary surveys for individual property owners.
Plat Recording Requirements: RSMo Chapter 445
Missouri Revised Statutes Chapter 445 governs the preparation and recording of subdivision plats. Any subdivision of land in Missouri requires a plat prepared by a licensed PLS and recorded with the county recorder before lots can be sold or conveyed by lot number.
Key requirements under Chapter 445 include:
- The plat must bear the seal and signature of a licensed Missouri PLS
- The plat must show lot dimensions, bearings, and all easements
- The plat must reference the county PLSS coordinates or a prior recorded plat
- The plat must be approved by local planning and zoning authorities before recording in most Missouri counties
- The recorded plat becomes a permanent part of the county's land records
Failure to comply with Chapter 445 can result in the county recorder refusing to accept a plat and may expose the subdivider to legal liability for lot sales made without a valid recorded plat.
Survey Monuments and Missouri Law
Survey monuments are physical markers placed at property corners to identify legal boundary points. In Missouri, common monument types include iron rebar pins, concrete monuments, mag nails set in pavement, and in older rural surveys, rock piles or blazed trees referenced in deed descriptions.
Missouri law prohibits removing, destroying, or intentionally moving a survey monument. Monuments at section corners and quarter-section corners in the PLSS are federal land records as well as state records, and their protection is taken seriously. Private property corner monuments set by licensed PLSs are also protected under Missouri law.
When a licensed PLS sets a new monument during a boundary survey, they record the monument's location and description in their survey plat. This creates a permanent record allowing future surveyors to locate and reference the monument even if it becomes buried or obscured over time.
What Constitutes a Legally Binding Survey in Missouri
For a survey to be legally binding in Missouri, it must meet all of the following criteria:
- Performed by a licensed Missouri Professional Land Surveyor
- Based on a thorough review of deed records, recorded plats, and all available boundary evidence
- Documented in a formal survey plat or record of survey showing dimensions, bearings, monuments, and the surveyor's basis of opinion
- Bearing the surveyor's official seal and original signature
- Recorded with the county recorder if the survey establishes a new subdivision or boundary line that affects public records
A survey that lacks any of these elements, such as one produced without a seal or prepared by an unlicensed person, is not legally recognized in Missouri courts or county offices.
Property Line Disputes in Missouri
When neighboring property owners in Missouri disagree about the location of a boundary, several options exist for resolution:
Boundary Survey as Evidence
The most common first step is hiring a licensed PLS to perform a boundary survey and produce a plat documenting the legal line. Missouri courts treat a properly prepared, sealed, and signed survey plat as strong evidence of the property boundary. If the neighbor accepts the survey's findings, the dispute can be resolved without litigation.
Boundary Line Agreement
Missouri allows neighboring property owners to enter into a boundary line agreement, also called a lot line adjustment. This is a recorded document that establishes an agreed-upon boundary line, often when two neighbors want to resolve a minor overlap or ambiguity in their deeds. A licensed PLS typically prepares the survey supporting the agreement, and a real estate attorney drafts the recorded document.
Adverse Possession
Missouri recognizes adverse possession as a legal doctrine under which a party who has openly, continuously, and exclusively occupied land for ten years or more may acquire legal title to it. Adverse possession claims are litigated in Missouri circuit court and require clear and convincing evidence. A boundary survey is typically central to the evidence in an adverse possession case.
Litigation
If negotiation and recorded agreements fail, Missouri circuit courts have jurisdiction over boundary disputes. Courts apply Missouri property law, consider the licensed surveyor's evidence, and may appoint a court surveyor to provide an independent opinion. Litigation is costly and time-consuming, which is why resolving disputes through a mutually accepted survey is nearly always preferable.
Missouri GIS Resources for Property Research
Before ordering a survey, Missouri property owners can use publicly available GIS resources to understand their parcel's approximate location and dimensions:
- The Missouri Spatial Data Information Service (MSDIS) at msdis.missouri.edu offers statewide parcel and land records data
- County assessor parcel viewers are available for most Missouri counties, including Jackson County, St. Louis County, Greene County, and Boone County
- Recorded subdivision plats can be searched through county recorder offices and the Missouri Secretary of State's recorded documents database
These resources provide useful background but are not substitutes for a licensed survey. GIS maps are approximations based on deed records and are not spatially precise enough to establish legal property lines or confirm setback compliance.
Find a Licensed Missouri Land Surveyor
For any survey need in Missouri, start with a licensed Professional Land Surveyor verified through APELSLA. Browse our Missouri land surveyor directory to find licensed PLSs in your county, compare services, and request quotes.